Yahoo first introduced its personal search offering last October. Slightly different than what Google has introduced, it allows people to do standard Web searches but provides more ways to use the resulting information.
Links can be saved to an archive, for instance. And using Really Simple Syndication (RSS), users can share links with other people.
These kinds of services, however useful they might turn out to be, have raised some concerns over privacy, in an era where we already have to worry about spyware and other issues of privacy invasion.